Tire-valve.



F. B. CARLISLE.

TIRE VALVE.

unxoulox rxLnD 001.91, 1910.

Patented May 9, 1911.

valve is UNITED STATES NPATENT OFFICE;

FRED 1B. CARLISLE, 0F MALDEN, MASSACHUSETTS, ASSIGNOB TO STANDARD AUTO vALvn comm, or BOSTON, MASSACHUSETTS, A CORPORATION or Massimino-.

TIRE-VALVE.

snTTs.

. Speoioation of Letters Patent.

Application yfiled October 31., 1910. -Serial No.` 589,857.

To all whom 'it may concern:

Be it known that I, FRED B. CAnmsLE, a citizen of the United States, residing in Malden, in the county of Middlesex and State of Massachusetts have invented an Im rovement in Tire-valves, of which the fol owing descri tion, in connection with the accompanying rawings, is a specification, like letters on the drawings representing like parts.-

The present invention relates to a valve for pneumatic tires, the purpose of the invention being to simpli the construction and to increase the ca acity of the inilating passage without detriment to the holding capacity of the valve, provision being also made for deating, and mechanically holding the valve open during deflation, at the same time aording a relatively large passage for the outflowing air.

In accordance with the invention, the rovided with a main outer tube or casing a apted to be clamped in the -tire in the usual way, the said casing constituting a guide member for a concentric inner tubular portion which, in the construction shown, constitutes the initial passage for the ingress and egress of the air. The valve, however, is arranged to close the entire outer tube or 'guide way, when seated, the said tube being rovided at its inner end within the tire wit a valve seat, so that apart from the advanta e of readily deilating the tire, the outer tu or casing and the valve coo rating therewith constitute a practical tire valve. The valve itself constitutes a disk of rubber Or other suitable material ada ted to engage the seat at the inner end of e tube or casing and close the entire orifice. Under normal conditions the concentric inner tube dportion above described' is slightly7 separate from the valve, so that air entering the main tube will act on nearly the entire area of the valve disk, the pres- .vided,in accordance with the present invenvisa tion, with right and left hand threads adapted to be operated uplon ly a single nut having corresponding t rea s in diierent locations, sO that by turning the said nut the two tubes are given a relative lon itudinal movement and are locked in any zsired position.

Figure 1 is a vertical section of a valve embodying the invention, shownas applied to a tire; Figil 2 is a similar view showing the valve mec anically Opened for the purpose of deflatin the tire; Fig. 3 is a plan view of the en of the valve which is contained in the tire; Fi 4 is a horizontal section, on a line :v o Fig. 2; and Fig. 5 partial view of a valve detached from t-he tire showing a slight modification.

The valve embodying the invention consists of a tube a provided at one end with a liange a2 adapted to engage the inner surface of a tire or inner tube, and with an external' thread adapted to take the clamping nut a at the outside of the tire andthe ordinary dust ca which is not herein shown.

The imensions of the tube and the thread may be the same as those of the Schrader valve now commonly used, so that the valves Patented May 9, 1911.

tire in which the Schrader valves are now employed. y

The tube a is provided at the end within the flange a2 with an annular valve seat a* to coperate with the valve b which is shown as consisting of a disk of rubber slightly greater in area than the area of the opening through the main tube, ,the dii'erence in area bein only sufficient to afford a tight seat for t e valve without making any material difference between the area acted upon by pressure from the outside and that acted on from the inside. By this construction it will be seen that while the valve is tight when seated, it is easily unseated by the incoming pressure, a very slight movement of the valve, moreover, aordin a relatively lar e space for the incoming air, so that the in ation of the tire is rendered relatively easy. In the construction shown, the valve b is provided with a reinforcing piece b2 shown as a metal spider fitting over the top of the disk and having down turned win s b3 which t Within a recess as formed in. t e flan e a? around the valve seat, and thereby gui e and position the valve. The lvalve is normally held.seated by means of a light lOl an inclosing case d adapted to be screwed on the outside of the fia-nge a2 and being provided with holes or openings d2 through which the air passes into the tire.

It is obvious from the above description that this construction alone constitutes an efficient and' practicable tire valve, there being, however, no means for readily deflating the tire except by the insertion of some tool or vthe like in the tube to press the valve olf its seat.

l In order to provide the valve with means for readily detlating the tire, the main tube a is provided with an inner concentric tube e provided at its outer end with a screw threade2 to take the ordinary valve cover or a pump nipple. The said tube has an enlarged inner portion e3, shown as provided with an inclined annular shoulder e* y adapted to seat against a corresponding shoulder withinthe tube a, these two shoul ders being normally drawn together when the valve is in use, as shown in Fig. 1, the inner tube being of such length as to be wholly disengaged from the valve. b when in this position. It is obvious, therefore, that air entering the tube e will 4flow into the space behind the valve d and unseat the same, thereby ventering the tire. Furthermore, if the inner tube e is moved longitudinally inward it will engage and unseat the valve as shown in- Fig. 2, thus allowing the air in the tire to flow .freely into the main tube, so that it can escape through the space between the said tubes.

' When the valve is in its normal position for inflation, as shown in Fig. 1, the shoulder e4 and the corresponding shoulder within thel tube a constitute a limiting stop to hold'the parts firml in position, and also constitute a valve to c ose the space between the inflating tube and the tubular casing, so that the air pumped into the inlating tube cannot blow back through the space between said intlating tube and the casing. v

In order to produce a positive movement of the tube e with relation to the outer tube a, an actuating nut f is employed, the said nut having vat one end an internal thread f2, and at 'the other end an internal thread f3, the said threads being cut in opposite directions and adapted to coperate with the thread e2 on the inner tube and a thread a on the outer tube. The inner tube e is prevented from turning by means of a projecting member or members e5 engaging in slots a7 in the outer tube, so that by turning the,

nut f the inner tube is positively moved longitudinally and will be held in :an positionin which it is left. To deflate t e tire,

therefore, is necessary only to rotate the nut f,"ths moving vthe inner tube e until 35..

the` valve b; has beennnseated, after which cable, and in some cases desirable, to 'close the inner end of the tube e and to rovide said tube with lateral ports e, so t at the air iowing from said tube will reach the valve through the space around the ,closed inner end thereof. Such a construction is shown in Fig. 5, and the ports e are valso shown in the other drawings, although they may, of course, be dispensed with when the tube e is open all the way through, since there is space enough between the two tubes to allow the air to escape from within when the valve is mechanically unseated.

What I claim is:

1. A valve consisting of a tubular casing -havin a iange at one end, said flange being provi ed with aI recess or pocket, and with .a valve seat at the end of the passage through the casing, combined with a valve member cooperating with said valve-seat, said valve member being contained in and guided by said pocket and an iniating'tube independent of said valve member and said casing.

` the air will flow freely out. It is practin i 2. A tire valve consist-ing of a tubular casing provided at one end with an external valve seat; a flange surrounding said seat and being provided with a recess or pocket around the seat; a valve disk loosely tting said pocket; a retaining cap secured to the flange to keep the valve in position; and an inflating tube within the casing independent of said valve. A

3. A tire valve consisting of a tubular casing provided at one end with an external valve seat; a liange surrounding said seat and being provided with a recess or pocket around the seat; a valve disk loosely fitting said pocket; a retaining cap secured to the flange to keep the valve in position; a spring between said cap and the valve disk; and an infiating tube Within the tubular casing independent of said valve, said tube being longi- .tudinally movable for the purpose of mechanically unseating the valve.

4. A tubular tire valve consisting of a tubular casing provided at one end with an external valve seat surrounding the tubular opening; a portion extended beyond said valve seat to form a pocket or recess around said seat; a valve fitting iny and guided by said recess and coperatin with said valve seat; means for yielding y pressing said valve toward said seat; an inflating'tube independent of said valve and tubular casing; and means for closing communication between said iniating tube and-said easing.

5. The combination with a tubular valve provided at one end with an' external-.valve seat toform a recess or pocket; a disk valve rovided with a 'reinforcing piece in the seat; of a portion projecting beyond said spring bearing upon said reinforcing piece ;I

and means for holding said spring in position. f l

6. The combination with a tubular casing provided at one end with a valve seat; of a valve coperating with said seat; means for yieldingly retaining said valve in proximity y to said seat, said valve being adapted to be seated by back pressure; a longitudinally movable inflating tube located within said l seat; an inner tubular member normally out of' engagementv wit-h said valve, said lnner tubular member projecting beyond the outer member land being ada ted to be coupled to a pump nipple for in ating purposes; and

4fmeans for producing a longitudlnal movev `ment of said inner tubular member and retaining the said Vmember in any position to which it has been moved.

8. In a tire valve, the combination with a tubular Vouter casing provided at one end with a flange to seat against the inner surface of the tire and a valve seat formed in said flange; a valve coperating with said seat; a retaining ca for said valve secured to said flange; a ongitudinally movable inner member provided with an inilating passage and provision for coupling a pump nipple; external screw threads on the outer casing and inner member, respectively, said lthreads being opposite in direction; and a nut having two threaded portions to cooperate with the threaded portions on the outer casing and the inner member, respectively substantially as and for the purpose descri y v In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses W. E. CovENnY,

As. J. MALONEY. 

